Dehydration of 3- and 4-aryl- substituted 3-hydroxy acids in acetic anhydride in presence of zinc chloride
作者:Ch.P. Ivanov、D.M. Mondeshka
DOI:10.1016/0040-4020(73)80122-x
日期:1973.1
The reaction of several di- and triaryl-substituted 3-aryl-3-hydroxy acids and a 4-aryl-3-hydroxy acid in aceticanhydride in the presence of anhydrous zinc chloride has been investigated. It has been shown that the reaction discovered with 3-(2′-thienyl)-substituted 3-hydroxy acids, namely, their conversion under the above stated conditions into α, β-unsaturated methyl ketones,1,2 occurs also with
Polman,H. et al., Recueil des Travaux Chimiques des Pays-Bas, 1973, vol. 92, p. 845 - 854
作者:Polman,H. et al.
DOI:——
日期:——
Photoredox-Catalyzed C–H Arylation of Internal Alkenes to Tetrasubstituted Alkenes: Synthesis of Tamoxifen
作者:Quannan Wang、Xiaoge Yang、Ping Wu、Zhengkun Yu
DOI:10.1021/acs.orglett.7b03223
日期:2017.11.17
Visible-light-induced direct C–H arylation of S,S-functionalized internal alkenes, that is, α-oxo ketene dithioacetals and analogues, has been efficiently realized with aryldiazonium salts (ArN2BF4) as coupling partners and Ru(bpy)3Cl2·6H2O as photosensitizer at ambient temperature. The strategy to activate the internal olefinic C–H bond by both the alkylthio and electron-withdrawing functional groups